I-Electroretinography

I-Electroretinography isivivinyo sokulinganisa impendulo kagesi yamaseli ezwela ukukhanya kwamehlo, abizwa ngama-rods kanye nezigaxa. Lawa maseli ayingxenye ye-retina (ingxenye engemuva kweso).

Ngenkathi usesikhundleni sokuhlala, umhlinzeki wezokunakekelwa kwezempilo ubeka amathonsi abindayo emehlweni akho, ngakho-ke ngeke ube nokukhathazeka phakathi nokuhlolwa. Amehlo akho avuliwe ngethuluzi elincane elibizwa ngokuthi i-speculum. Inzwa kagesi (i-electrode) ibekwe esweni ngalinye.

I-electrode ilinganisa umsebenzi kagesi we-retina ekuphenduleni ukukhanya. Ukukhanya okukhanyayo, futhi impendulo kagesi ihamba isuka ku-electrode iye esikrinini esifana ne-TV, lapho ingabukwa futhi iqoshwe khona. Iphethini ejwayelekile yokuphendula inamagagasi abizwa ngo-A no-B.

Umhlinzeki uzothatha ukufundwa ekukhanyeni kwegumbi elijwayelekile abuye futhi ebumnyameni, ngemuva kokuvumela imizuzu engama-20 yamehlo akho ukuthi alungise.

Akukho ukulungiselela okukhethekile okudingekile kulolu vivinyo.

Ama-probes ahlala esweni lakho angazizwa eklwebheka kancane. Isivivinyo sithatha cishe ihora elilodwa ukwenza.

Lokhu kuhlolwa kwenziwa ukuthola ukuphazamiseka kwe-retina. Kuyasiza futhi ekunqumeni ukuthi ngabe kunconywa ukuhlinzekwa kwe-retinal.

Imiphumela yokuhlola ejwayelekile izokhombisa iphethini ejwayelekile ka-A no-B ukuphendula i-flash ngayinye.

Izimo ezilandelayo zingadala imiphumela engajwayelekile:

• I-arteriosclerosis enomonakalo ku-retina
• Ubumpumputhe bokuzalwa ebusuku
• I-retinoschisis yokuzalwa (ukuhlukaniswa kwezendlalelo ze-retinal)
• I-Giant cell arteritis
• Imithi (chloroquine, hydroxychloroquine)
• I-Mucopolysaccharidosis
• Ukuhlukaniswa kwe-retinal
• I-Rod-cone dystrophy (i-retinitis pigmentosa)
• Ukuhlukumezeka
• Ukushoda kuka-Vitamin A.

I-cornea ingathola ukuklwebheka kwesikhashana ebusweni kusuka ku-electrode. Ngaphandle kwalokho, azikho izingozi ngale nqubo.

Akufanele uhlikihle amehlo akho ihora lonke ngemuva kokuhlolwa, ngoba lokhu kungalimaza i-cornea. Umhlinzeki wakho uzokhuluma nawe ngemiphumela yokuhlolwa nokuthi kusho ukuthini kuwe.

ERG; Ukuhlolwa kwe-Electrophysiologic

• Imininingwane lens electrode esweni

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UMiyake Y, uShinoda K. I-electrophysiology yemitholampilo. Ku: Schachat AP, Sadda SVR, Hinton DR, Wilkinson CP, Wiedemann P, abahleli. URitina kaRyan. Umhlaka 6. IPhiladelphia, PA: Elsevier; 2018: isahluko 10.

UReichel E, uKlein K. I-Retinal electrophysiology. Ku: Yanoff M, Duker JS, ama-eds. I-Ophthalmology. Umhlaka 5. IPhiladelphia, PA: Elsevier; 2019: isahluko 6.9.